Which test is primarily used to assess executive function and cognitive flexibility in TBI patients?

Which test is primarily used to assess executive function and cognitive flexibility in TBI patients?

• A. WAIS
• B. Trail Making Test
• C. Wisconsin Card Sorting Test
• D. CRS-R

Answer: (C)

Executive function and cognitive flexibility involve adapting strategies and shifting mental sets when rules change. The Wisconsin Card Sorting Test is designed to probe exactly that: you sort cards by an initially learned rule that changes without warning, so you must infer the new rule from feedback and then switch to it. This requires flexible thinking, monitoring errors, and updating plans—core aspects of executive control that are often impaired after traumatic brain injury, especially with frontal-lobe involvement. The test yields measures like categories achieved and perseverative errors, which reflect how well someone can revise their approach in the face of changing rules. The other tests serve different purposes: the WAIS is a broad intelligence measure, the Trail Making Test assesses set-shifting and processing speed but is more of a quick screening, and the CRS-R evaluates consciousness in coma, not executive function.

Executive function and cognitive flexibility involve adapting strategies and shifting mental sets when rules change. The Wisconsin Card Sorting Test is designed to probe exactly that: you sort cards by an initially learned rule that changes without warning, so you must infer the new rule from feedback and then switch to it. This requires flexible thinking, monitoring errors, and updating plans—core aspects of executive control that are often impaired after traumatic brain injury, especially with frontal-lobe involvement. The test yields measures like categories achieved and perseverative errors, which reflect how well someone can revise their approach in the face of changing rules. The other tests serve different purposes: the WAIS is a broad intelligence measure, the Trail Making Test assesses set-shifting and processing speed but is more of a quick screening, and the CRS-R evaluates consciousness in coma, not executive function.